Alert archive / Oklahoma / Severe Thunderstorm Warnings in 1990

Severe Thunderstorm Warning 12, NWS Tulsa, OK

April 9, 1990Mayes County, Oklahoma

NWS Tulsa, OK issued this severe thunderstorm warning at Apr 9, 1990, 9:36 PM CDT for Mayes County, Oklahoma. It was in force for 69 min. 1 report came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued
Apr 9, 1990, 9:36 PM CDT (02:36 UTC)
Expired
Apr 9, 1990, 10:45 PM CDT
In force
69 min
Issued by
NWS Tulsa, OK
Area
Whole counties

County Mayes County, OK

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

What was reported inside it

TimeReportWhereRemark
Apr 9, 9:40 PM CDTHail 0.88Mayes, OK

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.

The nearest sounding before it

Springfield, MO (KUMN), launched 00:00Z, 2.6 hours before the alert went out and 144 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Springfield, MO at 00:00Z on 1990-04-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Springfield, MO at 00:00Z on 1990-04-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 231 square meters per square second.1939587897Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
904 m above ground
0-6 km bulk shear
39 kt
0-1 km storm-relative helicity
231 m²/s²
0-3 km storm-relative helicity
236 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUL 100236
SVRTUL
OKC097-100345-
 
BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TULSA OK
936 PM CDT MON APR 9 1990
 
THE NATIONAL WEATHER SERVICE IN TULSA HAS ISSUED A
SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 1045 PM CDT
FOR PEOPLE IN THE FOLLOWING COUNTIES ...
 
IN NORTHEAST OKLAHOMA
 
   ...MAYES COUNTY
 
AT 935 PM THE TULSA RADAR INDICATED SEVERE THUNDERSTORMS BETWEEN
SALINA AND PRYOR MOVING TO THE NORTHEAST AT 30 MPH.
 
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MPH...
LARGE HAIL...DEADLY LIGHTNING AND VERY HEAVY RAIN.  FOR YOUR
PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS.

The office that day

Everything else NWS Tulsa, OK issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Apr 9, 8:26 PM CDTSevere Thunderstorm WarningTSAMayes, Rogers64 min
Apr 9, 9:14 PM CDTSevere Thunderstorm WarningTSADelaware61 min
Apr 9, 10:00 PM CDTSevere Thunderstorm WarningTSACherokee60 min
Apr 10, 1:59 AM CDTSevere Thunderstorm WarningTSACherokee61 min
Apr 10, 2:06 AM CDTSevere Thunderstorm WarningTSAPittsburg69 min
Apr 10, 2:20 AM CDTSevere Thunderstorm WarningTSAAdair40 min
Apr 10, 2:20 AM CDTSevere Thunderstorm WarningTSAHaskell, Latimer40 min
Apr 10, 2:24 AM CDTSevere Thunderstorm WarningTSASequoyah66 min
Apr 10, 2:39 AM CDTSevere Thunderstorm WarningTSALeFlore66 min

Nearby

Severe Thunderstorm Warnings in Oklahoma, 1990Every severe thunderstorm warning in 1990

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.